Contribution of bismuth melts to gold endowment in the Baolun gold deposit, Hainan Island, South China
文献类型：期刊论文
| 作者 | Yan, Shuang1,2; Shan, Qiang1,2; Xu, Deru3; Yu, Xueyuan1,2 |
| 刊名 | ORE GEOLOGY REVIEWS
 |
| 出版日期 | 2024-10-01 |
| 卷号 | 173页码:12 |
| 关键词 | Bismuth melt Gold mineralization Gold-bismuth melt blebs Baolun gold deposit Hainan Island |
| ISSN号 | 0169-1368 |
| DOI | 10.1016/j.oregeorev.2024.106258 |
| 英文摘要 | Bismuth (Bi) melts and related polymetallic alloys can efficiently scavenge gold (Au) from Au-unsaturated aqueous solutions, contributing to the Au endowment in many hydrothermal deposits. However, original evidence for Au-Bi melts is often poorly preserved due to post-precipitation alteration. This complicates investigation of the liquid bismuth collector model in hydrothermal Au deposits. Here we present primary evidence for the occurrence of Au-Bi melt in hydrothermal systems through an examination of the Au-Bi phases and textures in the Baolun Au deposit (Hainan Island). This study found that maldonite, native bismuth, Au-Bi symplectite and Au-Bi melt blebs appeared successively following the precipitation of native gold. Notably, large Au-Bi melt blebs were well preserved in natural systems due to the rapid cooling of fluids. The mineral assemblages and their corresponding fluid physiochemical conditions suggest that the evolution of the ore fluids at Baolun was characterized by a continuous reduction in Au and Bi concentrations and Au/Bi ratios alongside decreasing fluid temperatures and sulfur fugacity (fS(2)). These observations offer direct evidence for Au scavenging by Bi melts in a mesothermal (275-450 degrees C), low-fS(2) and reduced hydrothermal system, aligning well with the Au-Bi binary phase evolution established in metallurgy. As the fluid cooled further, the Au-Bi phases were subsequently overprinted by later Te-S-rich fluids, as evidenced by the formation of bismuthinite, jonassonite, and jos & eacute;ite-A around the Au-Bi phases. Importantly, our study reveals that the Baolun Au deposit is characterized by a Au-Bi-Te hydrothermal system and that the metamorphic country rocks at Baolun are the major source of Au, Bi, and Te. |
| WOS研究方向 | Geology ; Mineralogy ; Mining & Mineral Processing |
| 语种 | 英语 |
| WOS记录号 | WOS:001328233200001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/81200]  |
| 专题 | 中国科学院矿物学与成矿学重点实验室 |
| 通讯作者 | Shan, Qiang |
| 作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Geochem, CAS Key Lab Mineral & Metallogeny, Guangdong Prov Key Lab Mineral Phys & Mat, Guangzhou 510640, Peoples R China 2.CAS Ctr Excellence Deep Earth Sci, Guangzhou 510640, Peoples R China 3.East China Univ Technol, Sch Earth Sci, Nanchang 330013, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yan, Shuang,Shan, Qiang,Xu, Deru,et al. Contribution of bismuth melts to gold endowment in the Baolun gold deposit, Hainan Island, South China[J]. ORE GEOLOGY REVIEWS,2024,173:12. |
| APA | Yan, Shuang,Shan, Qiang,Xu, Deru,&Yu, Xueyuan.(2024).Contribution of bismuth melts to gold endowment in the Baolun gold deposit, Hainan Island, South China.ORE GEOLOGY REVIEWS,173,12. |
| MLA | Yan, Shuang,et al."Contribution of bismuth melts to gold endowment in the Baolun gold deposit, Hainan Island, South China".ORE GEOLOGY REVIEWS 173(2024):12. |
入库方式： OAI收割
来源：广州地球化学研究所
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